* {
  margin: 0;
  padding: 0;
}

.header {
  width: 1280px;
  height: 160px;
  background: #0e0e0f;
  border: 0.2px solid #3a3f4a;
}
.head1 {
  width: 270px;
  height: 90px;
  float: left;
  margin-left: 33px;
}
.head1 img {
  width: 270px;
  height: 90px;

  margin-top: 30px;
}
.head2 {
  width: 270px;
  height: 90px;
  float: left;
}
.head2 img {
  width: 270px;
  height: 90px;
  margin-top: 30px;
}
.head3 {
  width: 270px;
  height: 90px;

  float: left;
  margin-left: 200px;
  margin-top: 5px;
  text-align: center;
  line-height: 160px;
}
.head3 input {
  width: 205px;
  height: 40px;
  text-align: center;
  background: #242424;
  border-radius: 20px;
  color: #f6f7ef;
}
.head4 {
  width: 82px;
  height: 40px;
  float: left;
  margin-left: 30px;
  text-align: center;
  line-height: 160px;
}
.head4 a {
  color: #f6f7ef;
  font-size: 14px;
  text-decoration: none;
}
.head5 {
  width: 82px;
  height: 40px;
  float: left;
  margin-left: 20px;
  text-align: center;
  line-height: 160px;
}
.head5 a {
  color: #f6f7ef;
  font-size: 14px;
  text-decoration: none;
}
.nav {
  width: 1280px;
  height: 102px;
  background: #0e0e0f;
}
.nav ul {
  width: 903px;
  height: 60px;
}
.nav li {
  /* width: 129px;
  height: 60px; */
  float: left;
  text-align: center;
  line-height: 102px;
}
.nav a {
  display: block;
  width: 129px;
  height: 60px;
  color: #a6a6a6;
  text-decoration: none;
}
.nav a:hover {
  box-sizing: border-box;
  border-bottom: 4px solid yellow;
}

:root {
  /* 颜色 */
  --white: #e9e9e9;
  --gray: #333;
  --blue: #095c91;
  --blue-r: #315a7491;
  --lightblue: #0393a3;
  /* 圆角 */
  --button-radius: 0.7rem;
  /* 大小 */
  --max-width: 758px;
  --max-height: 420px;
  font-size: 16px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}
body {
  align-items: center;
  background-color: var(--white);
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  display: grid;
  height: 100vh;
  place-items: center;
}
.form_title {
  font-weight: 300;
  margin: 0;
  margin-bottom: 1.25rem;
}
.link {
  color: var(--gray);
  font-size: 0.9rem;
  margin: 1.5rem 0;
  text-decoration: none;
}
.container {
  background-color: var(--white);
  border-radius: var(--button-radius);
  box-shadow: 0 0.9rem 1.7rem rgba(0, 0, 0, 0.25),
    0 0.7rem 0.7rem rgba(0, 0, 0, 0.22);
  height: var(--max-height);
  max-width: var(--max-width);
  overflow: hidden;
  position: relative;
  width: 100%;
}
.container_form {
  height: 100%;
  position: absolute;
  top: 0;
  transition: all 0.6s ease-in-out;
}
.container--signin {
  left: 0;
  width: 50%;
  z-index: 5;
}
.container.right-panel-active .container--signin {
  transform: translateX(100%);
}
.container--signup {
  left: 0;
  opacity: 0;
  width: 50%;
  z-index: 4;
}
.container.right-panel-active .container--signup {
  -webkit-animation: show 0.6s;
  animation: show 0.6s;
  opacity: 1;
  transform: translateX(100%);
  z-index: 8;
}
.container_overlay {
  height: 100%;
  left: 50%;
  overflow: hidden;
  position: absolute;
  top: 0;
  transition: transform 0.6s ease-in-out;
  width: 50%;
  z-index: 100;
}
.container.right-panel-active .container_overlay {
  transform: translateX(-100%);
}
.overlay {
  background-color: rgba(255, 255, 255, 0.25);
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  height: 100%;
  left: -100%;
  position: relative;
  transform: translateX(0);
  transition: transform 0.6s ease-in-out;
  width: 200%;
}
.container.right-panel-active .overlay {
  transform: translateX(50%);
}
.overlay_panel {
  align-items: center;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: center;
  position: absolute;
  text-align: center;
  top: 0;
  transform: translateX(0);
  transition: transform 0.6s ease-in-out;
  width: 50%;
}
.overlay--left {
  transform: translateX(-20%);
}
.container.right-panel-active .overlay--left {
  transform: translateX(0);
}
.overlay--right {
  right: 0;
  transform: translateX(0);
}
.container.right-panel-active .overlay--right {
  transform: translateX(20%);
}
.btn {
  background-color: var(--blue);
  background-image: linear-gradient(
    90deg,
    var(--blue) 0%,
    var(--lightblue) 74%
  );
  border-radius: 20px;
  border: 0.2px solid var(--blue-r);
  color: var(--white);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: bold;
  letter-spacing: 0.1rem;
  padding: 0.9rem 4rem;
  text-transform: uppercase;
  transition: transform 80ms ease-in;
}

.form > .btn {
  margin-top: 1.5rem;
}
.btn:active {
  transform: scale(0.95);
}
.btn:focus {
  outline: none;
}
.form {
  background-color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 0 3rem;
  height: 100%;
  text-align: center;
}
.input {
  background-color: #fff;
  border: none;
  padding: 0.9rem 0.9rem;
  margin: 0.5rem 0;
  width: 100%;
}
@-webkit-keyframes show {
  0%,
  49.99% {
    opacity: 0;
    z-index: 4;
  }
  50%,
  100% {
    opacity: 1;
    z-index: 8;
  }
}
@keyframes show {
  0%,
  49.99% {
    opacity: 0;
    z-index: 4;
  }
  50%,
  100% {
    opacity: 1;
    z-index: 8;
  }
}
.slidershow {
  position: absolute;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
.slidershow--image {
  position: absolute;
  width: 100%;
  height: 100%;
  background: no-repeat 50% 50%;
  background-size: cover;
  -webkit-animation-name: kenburns;
  animation-name: kenburns;
  -webkit-animation-timing-function: linear;
  animation-timing-function: linear;
  -webkit-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
  -webkit-animation-duration: 16s;
  animation-duration: 16s;
  opacity: 1;
  -webkit-transform: scale(1.2);
  transform: scale(1.2);
}
.slidershow--image:nth-child(1) {
  -webkit-animation-name: kenburns-1;
  animation-name: kenburns-1;
  z-index: 3;
}
.slidershow--image:nth-child(2) {
  -webkit-animation-name: kenburns-2;
  animation-name: kenburns-2;
  z-index: 2;
}
.slidershow--image:nth-child(3) {
  -webkit-animation-name: kenburns-3;
  animation-name: kenburns-3;
  z-index: 1;
}
.slidershow--image:nth-child(4) {
  -webkit-animation-name: kenburns-4;
  animation-name: kenburns-4;
  z-index: 0;
}
@-webkit-keyframes kenburns-1 {
  0% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  1.5625% {
    opacity: 1;
  }
  23.4375% {
    opacity: 1;
  }
  26.5625% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  98.4375% {
    opacity: 0;
    -webkit-transform: scale(1.21176);
    transform: scale(1.21176);
  }
  100% {
    opacity: 1;
  }
}
@keyframes kenburns-1 {
  0% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  1.5625% {
    opacity: 1;
  }
  23.4375% {
    opacity: 1;
  }
  26.5625% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  98.4375% {
    opacity: 0;
    -webkit-transform: scale(1.21176);
    transform: scale(1.21176);
  }
  100% {
    opacity: 1;
  }
}
@-webkit-keyframes kenburns-2 {
  23.4375% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  26.5625% {
    opacity: 1;
  }
  48.4375% {
    opacity: 1;
  }
  51.5625% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
}
@keyframes kenburns-2 {
  23.4375% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  26.5625% {
    opacity: 1;
  }
  48.4375% {
    opacity: 1;
  }
  51.5625% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
}
@-webkit-keyframes kenburns-3 {
  48.4375% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  51.5625% {
    opacity: 1;
  }
  73.4375% {
    opacity: 1;
  }
  76.5625% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
}
@keyframes kenburns-3 {
  48.4375% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  51.5625% {
    opacity: 1;
  }
  73.4375% {
    opacity: 1;
  }
  76.5625% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
}
@-webkit-keyframes kenburns-4 {
  73.4375% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  76.5625% {
    opacity: 1;
  }
  98.4375% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}
@keyframes kenburns-4 {
  73.4375% {
    opacity: 1;
    -webkit-transform: scale(1.2);
    transform: scale(1.2);
  }
  76.5625% {
    opacity: 1;
  }
  98.4375% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(1);
    transform: scale(1);
  }
}
